You control the green cube (It moves towards your mouse) and your goal is to reach the yellow cube without touching the other cubes.cubes with the same colour try to catch you in the same way, like red for example just moves towards you.The white lines at the top show which level you currently are at and well, in each level there are more other cubes and up to four different types of them, making it difficult enough for a simple game I guess.Have fun